Knowledge Base · Evergreen References

Knowledge Base

Practical guides distilled from 26 years of China-port experience. Covers HS codes, customs documentation, Incoterms, export VAT refunds, route economics, and more — written so importers, sourcing teams, and freight buyers can apply it directly.

Customs Documentation

HS Code Lookup & Classification Guide for China Exports

How China's 10-digit customs code is structured, where to verify it, the WCO classification rules, and what to do when classification turns out to be wrong.

~12 min read 2026-05-11
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Incoterms

DDP Shipping from China: Door-to-Door Duty Paid Guide

The full DDP workflow, cost breakdown, IOR requirements, duty estimation, common risks, and how DDP compares with DAP/DDU — for importers, Amazon FBA sellers, and DTC brands.

~14 min read 2026-05-20
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Incoterms

Incoterms 2020 Explained: FOB / CIF / CFR / DDP — How to Choose

The 11 Incoterms 2020 rules ranked by seller obligation: responsibilities, risk-transfer points, cost scope, and when to use each. Side-by-side FOB vs CIF and container shipping pitfalls.

~13 min read 2026-05-20
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DG Logistics

Lithium Battery & Dangerous Goods Shipping from China

UN3480 / UN3481 / UN3090 / UN3091, the four required documents (UN38.3, SDS, DG packaging cert, DGD), IATA air rules, IMDG ocean rules, and destination-country compliance for US, EU, UK, Canada, Japan, Australia.

~15 min read 2026-05-20
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Shipping Documents

Bill of Lading (B/L) Types & Handling Guide

MBL/HBL, straight / order / bearer, originals vs telex release vs Seaway Bill, the 14 critical fields, Switch B/L, lost-B/L recovery, and release-without-original risk.

~14 min read 2026-05-20
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Ocean Operations

Container Sizes & Load Calculation: How Much Fits?

20GP / 40GP / 40HQ / 45HC interior dimensions, real-world load capacity, CBM formula, LCL-vs-FCL tipping points, special containers, VGM, and trucking weight limits.

~13 min read 2026-05-20
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Coming Soon

More guides on the way

Topics in our pipeline:

  • China export VAT refund process
  • VGM and SI cutoff timeline
  • Certificates of origin: Form E, RCEP, FTAs
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